Low driving voltage in organic light-emitting diodes using MoO3 as an interlayer in hole transport layer

Abstract Driving voltage of organic light-emitting diodes (OLEDs) was lowered by applying MoO3 as an interlayer between hole injection layer (HIL) and hole transport layer (HTL). MoO3 was effective as an interlayer between HIL and HTL due to its valence band of around 5.3 eV which is suitable for hole injection. Hole injection from HIL to HTL was enhanced by MoO3 interlayer and driving voltage of green fluorescent device could be lowered by 1.3 V at 1000 cd/m2 by using thin MoO3 interlayer.

[1]  Chieh-Wei Chen,et al.  Integration of organic light-emitting diode and organic transistor via a tandem structure , 2005 .

[2]  Richard H. Friend,et al.  Inorganic solution-processed hole-injecting and electron-blocking layers in polymer light-emitting diodes , 2002 .

[3]  Ah-Reum Jung,et al.  Preparation of Fullerene/TiO2 Composite and Its Photocatalytic Effect , 2007 .

[4]  Chieh-Wei Chen,et al.  High-performance organic thin-film transistors with metal oxide/metal bilayer electrode , 2005 .

[5]  Martin Pfeiffer,et al.  LOW VOLTAGE ORGANIC LIGHT EMITTING DIODES FEATURING DOPED PHTHALOCYANINE AS HOLE TRANSPORT MATERIAL , 1998 .

[6]  Ho Kyoon Chung,et al.  High efficiency and low power consumption in active matrix organic light emitting diodes , 2003 .

[7]  Yoshiki Kinoshita,et al.  Formation of Ohmic hole injection by inserting an ultrathin layer of molybdenum trioxide between indium tin oxide and organic hole-transporting layers , 2007 .

[8]  Ming-Ta Hsieh,et al.  Study of hole concentration of 1,4-bis[N-(1-naphthyl)-N-'-phenylamino]-4,4(') diamine doped with tungsten oxide by admittance spectroscopy , 2006 .

[9]  Jingze Li,et al.  Enhanced performance of organic light emitting device by insertion of conducting/insulating WO3 anodic buffer layer , 2005 .

[10]  Frank R. Wagner,et al.  Geometric and electronic structure of vanadium pentoxide: A density functional bulk and surface study , 1999 .

[11]  Yang Yang,et al.  Effective connecting architecture for tandem organic light-emitting devices , 2005 .

[12]  Robert A Norwood,et al.  CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES 3202 Controlled doping of phthalocyanine layers by cosublimation with acceptor molecules: A systematic Seebeck and conductivity study , 1998 .

[13]  Shunpei Yamazaki,et al.  P‐185: Low‐Drive‐Voltage OLEDs with a Buffer Layer Having Molybdenum Oxide , 2006 .